molds for plastic embedding

I am in desperate need of help.  The doctor that I work for wants to process, 
embed, and cut in plastics(Glycol Methacrylate[GMA]).  I don't know what 
embedding molds and mounts(should snap into the microtome just like the 
rectangular cassettes for paraffin) to use that would fit my microtome.  The 
microtome that I have is Microm HM 340 E.  I bought a standard specimen clamp 
and insert for small round specimens(25mm).  These two pieces fit onto the 
microtome.  If anyone out there is familiar with cutting plastics and ordering 
supplies such as molds and mounts, any help would be appreciated!!!
Happy & Safe Holidays!!!

Thanks for your help,



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